<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="css/grid.css">
</head>

<body>
    <span>文字1</span>
    <div class="container">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
    </div>
    <span>文字1</span>
    <div class="c1">
        <div class="i1">1</div>
        <div class="i1">2</div>
        <div class="i1">3</div>
        <div class="i1">4</div>
        <div class="i1">5</div>
        <div class="i1">4</div>
        <div class="i1">5</div>
    </div>
    <div class="c2">
        <div class="header"></div>
        <div class="left"></div>
        <div class="right"></div>
        <div class="footer"></div>
    </div>
</body>

</html>